Of different



(No Model.) 2 Sheets-Sheet 1.

G. LUHRIG. APPARATUS FOR WASHING, SEPARATING, AND GONGENTRATING ORES OF DIFFERENT SPEGIFIG- GRAVITY.

NO Q 'YLOZS. 47 Patented May 3, 92.

' akma/W Y ATTORNEY (No Model.) 2 Sheets-Sheet 2. O. LUHRIG. APPARATUS FOR WASHING, SBPARATING, AND OONGENTRATING ORES OF DIFFERENT SPECIFIC GRAVITY.

No. 474,023. Patented May 3, 1892.

WITNESSES: A INVENTUB WM%W fim/ .Q M ATTORNEY ITED STATES PATENT OFFICE.

CARL LUHRIG, OF DRESDEN, GERMANY, ASSIGNOR TO THE LUHRIG COAL AND ORE DRESSING APPLIANCES, LIMITED, on ENGLAND.

APPARATUS FOR WASHING, SEPARATING, AND CONCENTRATING ORES OF DIFFERENT SPECIFIC GRAVITY.

SPECIFICATION forming part of Letters Patent No. 474,023, dated May 3, 1892. Application filed January 29, 1892. Serial No. 419,646. (No model.) Patented in England September 1'7, 1890, NO- 14 723- To all whom it may concern: ing to this invention, instead of being sta- Be it known that I, CARL LUHRIG, a subject tionary, is attached to the movable frame so of the Emperor of Germany, residingatDresas to move to and fro with it. From A the den, Saxony, Germany, have invented certain liquid passes over the distributing table or new and useful Improvements in Apparatus feeder, composed of an inclined plane 13, onto for lashing, Separating, and Concentrating the india-rubber band C. In order to cause Ores of DifferentSpecific Gravities, (for which the liquid to flow gradually onto 0, it is pre- Letters Patent have been granted in England, ferred to fix to the edge of B a strip of calico dated Septemberl7, 1890, No.14,723,) of which or other absorbent fabric (t, which rests loosely IO the following is a specification. on the belt C, so as to distribute the pulp liquid This invention relates to improvements in by capillary action. apparatus known as percussionvanners To insure that the rubber band 0 shall refor treating ores and similar substances in a tain its position upon the rollerD, short strips pulverized state, by which the ore is sepaof wood E are attached to its outer surface I5 rated or classified according to its specific and placed in a row, so that as the band travgravity and each class is caused to pass into els they pass along an inverted channel-iron a separate trough as it leaves the vanner; F, which is fixed above the table. The guideand said invention consists in the herein-derollers G under the table are recessed to allow scribed means of guiding the traveling belt passage of the strips E.

20 by means of afiexible ridge thereon composed The friction of .the band C on the table is of sections or blocks of wood attached to the reduced by means of theidle-rollers I, placed outer surface of the belt and guided in a chanat suitable intervals apart so as to support nel-iron or other suitable groove above the the said band. belt lying parallel to the travel thereof. ater flows onto the band C from the trough 25 This invention also consists in a novel com- K by a pipe L, extending diagonally across pound arrangement of several traveling belts, the table, with a series of nozzles l 2 3 4 5 for each delivering a plurality of grades of ore jets of water to remove adhesive matter from concentrates and so relatively arranged that the rubber. the pulverized ore washed from one vanner The percussion action imparted in the usual 30 or from one set of vannersinapartially sepaway to the table separates the particles of rated or classified condition can be passed mineral into severahusually three, different over another vanner or set of vanners to be -classes, according to their respective gravisimilarly operated upon for more complete ties. The lightest collect on the band C and separation or classification, and finally delivare delivered by the hopper M into the recep- 35 ered into receptacles without requiring mantacle N, an'intermediate product is delivered ual labor. by P into Q, and the heaviest by R into S.

Having reference to the accompanying As shown by Fig. 5, six single tables are drawings, in which similar letters of reference combined so as to constitute a compound maindicate corresponding parts throughout the chine, so arranged that the lower sets of the 40 several views, Figure l is a plan View; Fig. apparatus can be fed by gravity from thevgo 2, a longitudinal sectional elevation; Fig. 3, upper sets without requiring any n1anipulaan end View; and Fig. 4, a cross-sectional tion of the material treated. view taken on the line 00 as, Fig. 1, showing a Although six tables are shown in Fig. 5, single percussion-table. Fig. 5 is an end eleobviously a greater or less number might be 5 vation, partly in section, showing the assemthus arranged. Assuming that there are only 5 blage of several percussion-tables in combithreenamely, the uppermost three shown in nation. Fig. 5they may be worked as follows: The

Referring first to Figs. 1, 2, 3, and 4, the material fed to the uppermost table is sepaliquid holding the mineral in suspension is rated into three classes, according to gravity,

5o supplied to the feeding-box A, which, accordas above described. The lightest may be alzoo lowed to flow to the table on the right, the intermediate quality to the table on the left, While the heaviest may be discharged as final products; or the products from each table may be discharged or treated in others of the ta bles, according to their character. The three tables are all connected to one motor, so as to work together.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In an ore concentrator and separator, the combination, with a percussion frame and endless apron or belt revolving thereon, of a sectional ridge, substantially as described, on the outer surface of the belt and'a guide composed of an inverted-U-shaped channel bar or groove embracing both sides of said ridge, for the purpose set forth.

2. In combination with a percussion-frame and endless apron or belt revolving thereon, a pulp-feeder composed of an inclined plane 3. In an apparatus for Washing, separating,

and dividing ore-concentrates into classes having different specific gravities, a plurality of laterally-inclined revolving belts, each delivering plural classes of concentrates-and intermediate to the discharges of one belt and the feed of another or others, a divided receptacle for the said different classes, each division thereof, except that for the tailin gs, communicating to the feeder of a successive belt, whereby a subdivision of the divided concentrates from the preceding belt is automatically effected simultaneously, as described.

CARL LUHRIG.

Witnesses:

EDWARD THORPE, M. J. SPENCER. 

